Sexy selfie in her underwear

It looks like this skinny 18 year old has chosen a public toilet or possibly a changing room to take her selfie in, standing there in her matching bikini tops and bottoms (they could be a pair of bra and panties though, I’m not sure. What do you think?). She is cute and quite the little spinner, a very petite girl with hardly any curves and a flat chest but still very attractive!